/Engine/Source/Editor/UnrealEd/Public/Subsystems/EditorActorSubsystem.h
Duplicate actors from the world editor.
The duplicated actors, or empty if it didn't succeed
[TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > DuplicateActors ( const [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & ActorsToDuplicate, [UWorld](API\Runtime\Engine\Engine\UWorld) * ToWorld, FVector Offset )